siblings of Borealis xx

half siblings maternal 7 half siblings paternal 17

half siblings maternal

stallion Acropolis xx (Thoroughbred, 1952, from Donatello II xx)

Acropolis xx
gender-male
1952

Donatello II xx / Hyperion xx

broodmare Aldousa xx (Thoroughbred, 1949, from Vatellor xx)

Aldousa xx
gender-female
1949

Vatellor xx / Hyperion xx

stallion Alycidon xx (Thoroughbred, 1945, from Donatello II xx)

Alycidon xx
gender-male
1945

Donatello II xx / Hyperion xx

broodmare Amboyna xx (Thoroughbred, 1943, from Bois Roussel xx)

Amboyna xx
gender-female
1943

Bois Roussel xx / Hyperion xx

broodmare Woodlark xx (Thoroughbred, 1944, from Bois Roussel xx)

Woodlark xx
gender-female
1944

Bois Roussel xx / Hyperion xx

broodmare Arousal xx (Thoroughbred, 1946, from Fairway xx)

Arousal xx
gender-female
1946

Fairway xx / Hyperion xx

stallion Agricola xx (Thoroughbred, 1956, from Precipitation xx)

Agricola xx
gender-male
1956

Precipitation xx / Hyperion xx